<!DOCTYPE html>
<html>
	<head>
		<meta charset="utf-8">
		<title></title>
		<style>
			.div1 {
				font-size: 30px;
				color: #FF0000;
				background-color: rgb(0, 0, 255);
				/* 这是注释 */
				/* border: 1px solid #FF0000; */
			}
		</style>
	</head>
	<body>
		<div class="div1">
			我是div
		</div>
	</body>
</html>
